A159076 A008474(n) + 2.

2, 5, 6, 6, 8, 9, 10, 7, 7, 11, 14, 10, 16, 13, 12, 8, 20, 10, 22, 12, 14, 17, 26, 11, 9, 19, 8, 14, 32, 15, 34, 9, 18, 23, 16, 11, 40, 25, 20, 13, 44, 17, 46, 18, 13, 29, 50, 12, 11, 12, 24, 20, 56, 11, 20, 15, 26, 35, 62, 16, 64, 37, 15, 10, 22, 21, 70, 24, 30, 19, 74, 12, 76, 43

Offset

1,1

Comments

The numbers can be constructed from the standard prime factorization n = Product (q_k^e_k), including a factor with q=1, then a(n) = Sum (q_k + e_k).

Links

Table of n, a(n) for n=1..74.

Example

For n=10=1^1*2^1*5^1 the a(10)=1+1+2+1+5+1=11.

Crossrefs

Cf.: A008474.

Sequence in context: A113975 A035585 A239868 * A273237 A278084 A225366

Adjacent sequences: A159073 A159074 A159075 * A159077 A159078 A159079

Keyword

nonn,less

Author

Jaroslav Krizek, Apr 04 2009

Extensions

Edited by R. J. Mathar, Apr 06 2009

Status

approved